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Logic analyzer with serial bus protocol on-line real-time detection analysis function

A logic analyzer and protocol analysis technology, applied in the field of logic analyzers, can solve problems such as inconvenient use, inability to achieve smooth and continuous display, and slow analysis speed of logic analyzers

Inactive Publication Date: 2014-07-30
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] However, there are still some problems in the logic analyzer with protocol analysis function: the analysis speed of the logic analyzer is relatively slow, it cannot detect and analyze online in real time, it cannot achieve the effect of smooth and continuous display, and it is inconvenient to use

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  • Logic analyzer with serial bus protocol on-line real-time detection analysis function
  • Logic analyzer with serial bus protocol on-line real-time detection analysis function
  • Logic analyzer with serial bus protocol on-line real-time detection analysis function

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Embodiment

[0024] In order to better illustrate the content of the present invention, a brief introduction to the logic analyzer is firstly made. figure 1 is a schematic diagram of a logic analyzer. Such as figure 1 As shown, the channel part of the logic analyzer uses probe + comparator + level conversion + DAC (Digital to Analog Converter, digital-to-analog converter), and the DAC is controlled by FPGA (Field-Programmable Gate Array, Field Programmable Gate Array). The threshold threshold level is sent to the comparator; the comparator completes the analog-to-digital conversion. If the probe input voltage is greater than the threshold threshold, it is logic "1", otherwise it is logic "0"; the level conversion chip converts the level logic into LVDS (Low Voltage Differential Signal, low voltage differential signal), so that the FPGA can accurately receive channel data. In this embodiment, there are 32 data channels. The system software running the logic analyzer in the ARM processor,...

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Abstract

The invention discloses a logic analyzer with a serial bus protocol on-line real-time detection analysis function. A serial bus protocol analyzing module is arranged in an FPGA of the logic analyzer, and a protocol analyzing module of a target serial bus protocol is arranged in the serial bus protocol analyzing module; the protocol analyzing module comprises a state analyzing machine and a data recombining module; the state analyzing machine is used for receiving the passage data of a collecting passage and analyzing the analysis result received by a data element; the data recombining module is used for combining the protocol analysis result obtained by the state analyzing machine with the passage data to obtain the data with the protocol analysis result, and memorizing the data in a DDR2 memory to be read by an ARM processor and displayed. The analysis of the serial bus protocol is realized in hardware, the analysis time is far shorter than the computing time of serial software, and the response time of a system is greatly shortened. Besides, the invention also provides a trigger module of the serial bus protocol, and the trigger module can be used for supplying the further accurate trigger for the serial bus protocol.

Description

technical field [0001] The invention belongs to the technical field of data domain testing, and more specifically relates to a logic analyzer with an online real-time detection and analysis function of a serial bus protocol. Background technique [0002] With the rapid development of digital electronic technology, the composition of modern digital electronic systems is becoming more and more complex, and the communication between various components of the system is increasingly dependent on a variety of digital buses, which also puts higher demands on the field of data testing. Require. [0003] As a traditional data domain test instrument, a logic analyzer plays an irreplaceable role in the development and testing of hardware logic, timing analysis, fault diagnosis and embedded software codes of digital electronic systems, and is indispensable for product development and functional maintenance of digital electronic systems. missing tools. In order to improve the test capa...

Claims

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Application Information

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IPC IPC(8): G06F11/22G06F13/42
Inventor 杨万渝戴志坚马敏赖建钧
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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